Honda ACCORD HYBRID 2005 Service Manual page 349

DTC P0171: Rear Bank (Bank 1) Fuel System
Too Lean
DTC P0172: Rear Bank (Bank 1) Fuel System
Too Rich
DTC P0174: Front Bank (Bank 2) Fuel System
Too Lean
DTC P0175: Front Bank (Bank 2) Fuel System
Too Rich
NOTE: If some of the DTCs listed below are stored at
the same t i m e as DTC P0171, P0172, P0174, and/or
P0175, troubleshoot those DTCs first, then recheck for
P0171, P0172, P0174, and/or P0175.
P0107, P0108, P1128, P1129: Manifold absolute
pressure (MAP) sensor
P0133, P0153, P1172, P1173, P2195, P2197, P2237,
P2238, P2240, P2241, P2243, P2245, P2247, P2249,
P2251, P2252, P2254, P2255, P2627, P2628, P2630,
P2631, P2A00, P2A03: Air fuel ratio (A/F) sensor
(Sensor 1)
P0134, P0135, P0154, P0155: A i r f u e l ratio (A/F) sensor
(Sensor 1)heater
P0137, P0138, P0139, P0157, P0158, P0159, P2270,
P2271, P2272, P2273: Secondary H 0 2 S (Sensor 2)
P0141, P0161: Secondary H02S (Sensor 2) heater
P0522, P0523, P2646, P2647, P2648, P2649: Variable
Cylinder M a n a g e m e n t (VCM) system
P0401, P0404, P0406, P2413: Exhaust gas recirculation
(EGR) system
P2279: Intake air leakage
1. Check the fuel pressure (see page 11-356).
Is the fuel pressure OK?
YES—Check the valve clearances and adjust if
necessary (DTC P0172 and P0175 only). If the valve
clearances are OK, replace the injectors (see page
11-211), then g o t o step 2.
NO—Check these items:
• If the pressure is too high, replace the fuel
pressure regulator (see page 11-365), then go to
step 2. If the pressure is too low, check the fuel
p u m p , the fuel feed pipe, and the fuel filter. If
they are all OK, replace the fuel pressure
regulator (see page 11-365), then go to step 2.
2. Turn the ignition switch ON (II).
3. Reset the PCM w i t h the HDS.
4. Do the PCM idle learn procedure (see page 11-340).
5. Start the engine. Hold the engine speed at
3,000 r p m w i t h o u t load (in Park or neutral) until the
radiator fan comes on, then let it idle.
6. Test-drive under these conditions:
• Engine coolant temperature above 158 °F (70 °C)
• Transmission in D position
• Drive at a steady speed between 25—55 m p h
(40—88 km/h) for 5 minutes, then drive at a
steady speed between 15—75 m p h
(24—120 km/h) for 15 minutes.
NOTE: DTC P0171, P0172, P0174, and/or P0175 may
take up to 40 minutes of test driving to set. Use the
HDS to monitor the LT FUEL TRIM for 15 minutes of
d r i v i n g . If the value stays w i t h i n 10 % of 1.0 (0.0 % ) ,
there is no problem at this t i m e .
7. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
Y E S - l f DTC P0171, P0172, P0174, or P0175 is
indicated, g o t o step 1. If any other T e m p o r a r y
DTCs or DTCs are indicated, go to the indicated
D T C s troubleshooting.
NO—Troubleshooting is complete. •
11-109